Sittoflneys



1.B.H00uL LOCKING NUT FOR BOLTS.

APPLICATION men nc.1. 1911.

Fig.1.

FMIIIIIIIIIIIIM I i;

A rrokhz ys Patented Dec 16,1919.

. J'mEs BnUcE noon, or snEEEIELn, ENGLAND.

LOCKING-NU? Eon norms.

SpecIflcationotIQetter I-Patent. Patented Dec. 16, 1 919.

" unification filed December 7, 917.- Jserial lib. 20 ,002.:

To all coho/n it may concern: 4 Be it known that-I, JAMEs BRUCE Hoon,

subject of the King oi Great Britain and Ireland, residing at 38 Falmouth road,

-Abbeydale, Shefiield, in the countyof York shire, England, have invented certain new and useful Improvements in Locking-Nuts for Bolts, of which. the following is a speci- This invention relates to improvements in locking nuts for use in connection with bolts, studs, screwed spindles'and the like, and has for its object the production of a nut which will automatically lock itselfupon a screwed rod by means ofone or more coiled springs attached to the nut; 4 In the accompanying drawings':' Figure '1 is t e elevation of a bolt 'fitted with the im roved locking nut.

Fig. 2 is t e vertical: section-of a nut provided with one lockin spring; 1" v Fig. 3 is the vertical section of a nut provided with top ai' d bott m locking springs,

I and Fig. 4 isa plan of Fig. 3 i 'i According to this. inventionthe. nut 3 Figs. 1 and 2 is designed to carry one looking spring 2 andis preferably thicker than cordance with an ordinary nut forzthe same size "of bolt.

The upper part ofthefholefin the nut has a screw thread 3, and at the lower part of the nut there is a recess. 4 the diameter of which.

is greater than the diameter of- .the bottom of the thread in the upper part ot the nut, while the depth of the recess is variedin acsprin 2.

The coils of spring have approxi,-'' mately the same pitch as the screw thread in the nut and the upper end of the spring is rigidly attached to the upper part of the recess 4a'nd'in such a manner that the coils ablefor'use as .a sto I one'screwed rods and. or the purpose-of pre- -to obtain b Letters Patent is :'j.- p The com ination with a tapped nuthave i, ing a recess at each end and a. screw thread- 4 ed portion between, .ofa coiled spring in .25 the number of coils: in the lof the'spring form a -,continuation' of the ;screw thread,and in all cases the free end of the spriiig is always inside the recess and above the lower end of the nut. The spring may be made from circular or other see-- tloned wire, which may fit the screw thread on the bolt, and the inner diameter of the 1 spring or the pitch of the coils 'of the spring, or both these measurementa is or are so deslgn'ed that. there is an initialfrictional grip of the spring upon the thread of the bolt screwed into it.-

In the nut shown;in Figs. 3 and 4 there" and such springs are constructed and. ar:

1 ranged within the recess in exactly the saine manner'as the 'sihgle'fspring herei'nbefore 60. described with reference to Figs. 1 and '2. The Ifree end of the spring may be bent}; I andwork within a recess-8 inthe end of. the

nut as shown in Fi ."4; v

signed for use with bolts and, the like used ifqri" all 'kinds' of fastenings; and 'thenut Y S bwn-in Figs. 3.: and is particularly'suita "or regulating collar venting accidental movement of the nut- -either-direction.

- What I claim as my inventionanddesiref each of said recesses attached'to the inner t JA si RUcEHooD.

5 5- is a recessl-5 at both'ends of the .nut and each recess is fitted with a coiled spring '6v 

